Furnace



(No Model.)

J. SPRINGER.

FURNACE. 7 No. 363,261. Patented May 17, 1887.

N, PETERS. Phnlwuthcgnphur, war-1mm LLC.

NIED

JOI-IN SPRINGER, OF CLINTON, WISCONSIN.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 363,261, dated May 17, 1887.

Applicaiion filed May 27, 1886.

7 To all whom it may concern.-

Be it known that I, JOHN SPRINGER, of Olinton, in the county of Rock and State of Wisconsin, have invented new and useful Improvements in Heating-Furnaces and I do hereby declare that the following isa full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and useful improvements in the construction of heating-furnaces.

The object of the invention is to provide novel means for regulating the draft, taking the air for the same from the fioor,or the lower stratum of air in the furnace-room,and feeding the same to the tire either below the grate and up through the same or above the fire near the top of the combustion-chamber when it is desired to check the fire. As this stratum of air is generally foul, this exposure to the firegenerally destroys the noxious features of the same.

Another object is to draw thelower stratum of air from the room above and feed it also to the combustion-chamber, whence it passes off through the exit-flue from such combustionchamber.

Another object is that as the fouler stratum of air is thus drawn into the combustion-chamber of the furnace a circulation of the remaining air is obtained by providing means for ad mitting it into the air-chamber of the furnace, whence it is discharged in a heated condition, thus adapting the furnace for use in upper rooms as well as in the cellar and basement, and avoiding the necessity of aconnection with the air outside to feed the air-chamber of the furnace, the invention being designed especially as an improvement on the furnace described and shown in Patent No. 336,765, issued to me on the 23d day of February, 1886.

The invention consists in the peculiar con struction of the various parts of the furnace and their combination, as more fully hereinafter described and claimed.

Figure l is an elevation of my improved furnace. Fig. 2 is a rear plan of the door. Fig. 3 is a vertical cross-section of the door. Fig. 41s a view of the L-shaped damper-slide,whieh operates within the door. Figs. 5 and 6 are Serial No. 203,443. (No model.)

vertical central cross-sections at right angles to each other.

In the accompanying drawings, A represents the shell of a heating-furnace, having a combustion-chamber, B, and a grate, O.

D is a hollow base, having a series ofholes, a, in its walls, through which air is admitted to the air-chambers, which are located on each side of the co mbustionchamber. These openings are provided with aslide damper or dampers, 1), (shown in dottedlines,) and operated in the usual way by a handle protruding through the slot 0. I

H is the outer drum, J the smoke-flue, and K the spiral flange, the same as shown in my patent above referred to.

E is a chamber or open-top box secured to the front of the base, but having no communication with its interior. In the front wall of this box are a series of apertures, g, having a sliding damper to unclose or close them at will, and operated by the handle h,which protrudes through a slot in such front wall.

F is a hollow door,closed on all sides except the bottom, and when the door is shutitforms a prolongation of the open-top box beneath it. There are apertures i cut in the inner wall of the door, which lead into the ash-pit or under the grate 0. Just above these openings there is a diaphragm, 76, which would cut off any communication with the space above were not such diaphragm provided with perforations n. An L-shaped sliding damper, m, operated by means of a handle, 0, protrudes through aslot, r, in the front wall or plate of the door F, the whole so arranged as to unclose the openings 1' and close the apertures n in the diaphragm, or the opposite, as desired.

Near the top of the door, and in the inner wall thereof, there is a series of apertures, 8, through which the air escapes into the combustion-chamber above the fire when the apertures i are closed and those in the diaphragm are open.

G is a pipe by means of which air is taken from the floor of a room above and carried into the open-top box IE, whence it is admitted to the interior of the furnace, as described, and through the hollow door.

What I claim as my invention is- 1. The combination, with a furnace and the IOO combustion-chamber thereof, of a hollow door perforated on the inside and open at the bottom, the remainder of its sides being imperforate, an open-top box, E, provided with apertimes 9, and the damper-controlling aperture 9 below the bottom-of said door, substantially as and for the purpose specified.

2. Thecombination, with a furnace and the combustion-chamber thereof,of a hollow door,

constructed as described, having its inner wall 7 perforated near its top and bottom, a perforated diaphragm between the perforations at the top and those at the bottom,through which,

, when the perforations in the diaphragm are and bottom, as described, a perforated diaphragm therein, and an L-shaped sliding damper by means of which the lower series of perforations in the rear wall of the door and the perforations in the diaphragm are closed or unclosed, substantially as set forth.

4. In combination with a furnace having a hollow door with perforate inner wall and open at the bottom, as described, an open-top box attached to the base of the furnace and having dampered apertures, such box forming alower continuation of the chamber in the door when the latter is shut, as and for the purpose described.

5. In combination with a furnace having a hollow door with a'perforate inner wall and open at the bottom, and open-top box, as described, a pipe communicating with such box at one end and with the room above that in which the furnace is situated, as and for the purpose specified. v JOHN SPRINGER.

Witnesses:

O. 0. Guns, E. PREBLE. 

